CN210215808U - Needle bar rotating mechanism of sewing machine - Google Patents
Needle bar rotating mechanism of sewing machine Download PDFInfo
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- CN210215808U CN210215808U CN201920920183.7U CN201920920183U CN210215808U CN 210215808 U CN210215808 U CN 210215808U CN 201920920183 U CN201920920183 U CN 201920920183U CN 210215808 U CN210215808 U CN 210215808U
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- needle bar
- bevel gear
- sleeve
- sewing machine
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Abstract
The utility model belongs to the technical field of sewing machines, in particular to a needle bar rotating mechanism of a sewing machine, which comprises a needle bar arranged on a machine shell, wherein a rotating sleeve is sleeved on the needle bar, the needle bar can slide up and down relative to the rotating sleeve, and the rotating sleeve is rotationally connected on the machine shell through a bearing; the one end that the rotating sleeve is close to the casing inwards extends to the inner chamber of casing and is provided with driven bevel gear in, is provided with the rotating electrical machines on the lateral wall of casing, and the output of rotating electrical machines runs through the lateral wall of casing and is provided with drive bevel gear in to the inner chamber of casing, and drive bevel gear is connected with the driven bevel gear transmission, and the rotating sleeve passes through circumference coupling assembling and is connected with the needle bar and realizes synchronous rotation. The utility model discloses simple structure, transmission are stable and mechanical response is fast, and drive bevel gear all is located the inner chamber of casing with driven bevel gear, itself has a large amount of machine oil in the inner chamber with the help of the casing for drive bevel gear and driven bevel gear are difficult for wearing and tearing.
Description
The technical field is as follows:
the utility model belongs to the technical field of sewing machine, refer in particular to a needle bar rotary mechanism of sewing machine.
Background art:
when a traditional sewing machine is used for sewing, the needle rod cannot rotate in a proper mode according to the sewn stitches, so that under the feeding push-pull action of cloth, the stress of a bottom thread and an upper thread is unbalanced when the bottom thread and the upper thread are sewn, the sewing direction of a sewing needle cannot be consistent with the set sewn stitches, and the appearance attractiveness and sewing quality of a product are affected.
Therefore, in order to make the needle bar rotate adaptively according to the sewed stitch, the prior chinese patent (application No. CN201510152517.7) discloses a synchronous rotating mechanism for the needle bar of a sewing machine, which comprises a needle bar mounted on an upper housing and used for inserting a sewing needle, and a needle bar motor driving the needle bar to rotate, wherein the upper end of the needle bar is connected with a rotating seat in a penetrating manner, the rotating seat is provided with a first bearing for clamping the needle bar, and the needle bar forms rolling friction with the first bearing when moving up and down; the rotating seat is fixedly connected with the needle bar upper sleeve, the needle bar upper sleeve is arranged on the upper shell through a second bearing set, and the rotating seat is connected with the needle bar motor through a synchronous belt in a transmission mode. This structure is comparatively complicated, and it is connected because roating seat and needle bar motor pass through synchronous belt drive, has that transmission stability is not high, spare part wearing and tearing are very fast and response speed slow scheduling problem.
The invention content is as follows:
the utility model aims at providing a simple structure, transmission are stable, spare part is difficult for wearing and tearing and response speed is fast sewing machine's needle bar rotary mechanism.
The utility model discloses a realize like this:
a needle bar rotating mechanism of a sewing machine comprises a needle bar arranged on a machine shell, wherein the needle bar is driven by a driving mechanism to move up and down, a rotating sleeve is sleeved on the needle bar and can slide up and down relative to the rotating sleeve, and the rotating sleeve is rotatably connected to the machine shell through a bearing; the one end that the rotating sleeve is close to the casing inner chamber inwards stretches into in the inner chamber of casing and is provided with driven bevel gear, is provided with the rotating electrical machines on the lateral wall of casing, and the output of rotating electrical machines runs through the lateral wall of casing to be provided with drive bevel gear in the inner chamber of casing, and drive bevel gear is connected with driven bevel gear meshing, and the rotating sleeve passes through circumference coupling assembling and is connected with the needle bar and realizes synchronous rotation.
In the needle bar rotating mechanism of the sewing machine, the circumferential connecting assembly comprises a plane axially arranged on the side wall of the needle bar, the side wall of the rotating sleeve is radially provided with a fixing through hole along the axial direction, a contact pin is inserted into the fixing through hole, and the contact pin is in sliding contact with the plane.
In the needle bar rotating mechanism of the sewing machine, the side wall of the rotating sleeve is provided with the positioning through hole along the radial direction of the fixing through hole, the positioning pin is inserted into the positioning through hole, and the inner end of the positioning pin abuts against the side wall of the abutting pin.
In the needle bar rotating mechanism of the sewing machine, the rotating sleeve and the driven bevel gear are of an integrated structure, and the fixing through hole and the positioning through hole are both arranged on the driven bevel gear.
In the needle bar rotating mechanism of the sewing machine, the bearing is a shaft sleeve, one end of the shaft sleeve, which is close to the inner cavity of the machine shell, extends inwards into the inner cavity of the machine shell and is provided with an annular end cover, the end face of the driven bevel gear, which deviates from the shaft sleeve, is provided with bevel teeth, the end face of the driven bevel gear, which is close to the shaft sleeve, is in sliding contact with the corresponding end face of the annular end cover, and one end of the rotating sleeve, which deviates from the machine shell, extends outwards out of.
In the needle bar rotating mechanism of the sewing machine, the upper end face of the needle bar is provided with the thread passing hole along the axial direction, the thread passing hole is a blind hole, the side wall of the lower end of the needle bar outside the machine shell is provided with the thread outlet, the thread outlet is communicated with the thread passing hole, and the thread passing hole and the thread outlet are a thread leading channel of the upper thread of the sewing machine.
In the needle bar rotating mechanism of the sewing machine, the thread outlet is obliquely arranged, the lower end of the thread outlet is positioned on the side wall of the lower end of the needle bar, and the upper end of the thread outlet is positioned at the bottom of the thread through hole.
In the needle bar rotating mechanism of the sewing machine, the rotating sleeve is arranged at the bottom of the inner cavity of the machine shell, the sliding sleeve penetrates through the top of the inner cavity of the machine shell, the upper end of the needle bar penetrates through the sliding sleeve, and the needle bar can slide up and down relative to the sliding sleeve.
Compared with the prior art, the utility model outstanding advantage is:
1. the utility model has the advantages that the rotating motor is connected with the rotating sleeve through the transmission of the driving bevel gear and the driven bevel gear, the synchronous belt transmission in the prior art is replaced, and the transmission clearance between transmission parts is reduced, thereby effectively reducing the noise generated by the transmission;
2. the driving bevel gear and the driven bevel gear of the utility model can change the placing direction and the position of the rotating motor on the shell, optimize the overall structure of the sewing machine and effectively save the space resources of the shell;
3. the utility model discloses drive bevel gear and driven bevel gear all are arranged in the inner chamber of casing, itself has a large amount of machine oil in the inner chamber with the help of the casing for drive bevel gear and driven bevel gear are difficult for wearing and tearing.
Description of the drawings:
fig. 1 is an overall front view of the present invention;
fig. 2 is a perspective view of the inorganic case of the present invention;
FIG. 3 is an exploded view of the rotary sleeve, sleeve and clamping nut connection of the present invention;
FIG. 4 is a cross-sectional view of the needle shaft of the present invention;
fig. 5 is an exploded view of the needle bar and drive mechanism of the present invention.
In the figure: 1. a housing; 2. a needle bar; 3. rotating the sleeve; 4. a driven bevel gear; 5. a rotating electric machine; 6. a drive bevel gear; 7. a plane; 8. a fixing through hole; 9. a contact pin; 10. positioning the through hole; 11. a shaft sleeve; 12. an annular end cap; 13. clamping the nut; 14. a wire passing hole; 15. an outlet; 16. a sliding sleeve; 17. a main shaft; 18. a crank; 19. an eccentric pin; 20. a connecting rod; 21. a drive pin; 22. a drive shaft sleeve; 23. a limiting ring.
The specific implementation mode is as follows:
the invention will now be further described with reference to specific embodiments, with reference to figures 1 to 5:
the needle bar rotating mechanism of the sewing machine comprises a needle bar 2 arranged on a machine shell 1, wherein the needle bar 2 is driven by a driving mechanism to move up and down, a rotating sleeve 3 is sleeved on the needle bar 2, the needle bar 2 can slide up and down relative to the rotating sleeve 3, and the rotating sleeve 3 is rotatably connected to the machine shell 1 through a bearing; one end of the rotary sleeve 3 close to the inner cavity of the casing 1 extends inwards into the inner cavity of the casing 1 and is provided with a driven bevel gear 4, the outer side wall of the casing 1 is provided with a rotary motor 5, the output end of the rotary motor 5 penetrates through the outer side wall of the casing 1 to the inner cavity of the casing 1 and is provided with a driving bevel gear 6, the driving bevel gear 6 is meshed with the driven bevel gear 4 and is connected, and the rotary sleeve 3 is connected with the needle rod 2 through a circumferential connecting component to realize synchronous rotation.
The utility model has the advantages that the rotating motor 5 is connected with the rotating sleeve 3 through the transmission of the driving bevel gear 6 and the driven bevel gear 5, the synchronous belt transmission in the prior art is replaced, and the transmission clearance between transmission parts is reduced, thereby effectively reducing the noise generated by the transmission, and the structure is simple, the transmission is stable and the mechanical response is fast; meanwhile, the driving bevel gear 6 is in transmission connection with the driven bevel gear 5, so that the placing direction and the position of the rotating motor 5 on the machine shell 1 can be changed, the overall structure of the sewing machine is optimized, and the space resource of the machine shell 1 is effectively saved; in addition, the driving bevel gear 6 and the driven bevel gear 5 are both located in the inner cavity of the casing 1, and a large amount of engine oil is stored in the inner cavity of the casing 1, so that the driving bevel gear 6 and the driven bevel gear 5 are not easy to wear.
Meanwhile, an embodiment of the circumferential connection assembly: circumferential connection subassembly is including setting up plane 7 on the 2 lateral walls of needle bar along the axial, radially seted up fixing hole 8 along it on the lateral wall of rotatory sleeve 3, the interpolation of fixing hole 8 is equipped with conflict round pin 9, and conflict round pin 9 and plane 7 sliding contact.
Wherein, for the stability that improves the conflict round pin 9 and plane 7 and contact for conflict round pin 9 can be fixed in fixing hole 8, avoid conflict round pin 9 along fixing hole 8 radial outside removal, and then lead to unable synchronous rotation between rotatory sleeve 3 and the needle bar 2, radial positioning hole 10 has been seted up along fixing hole 8 on the lateral wall of rotatory sleeve 3, and positioning hole 10 interpolation is equipped with the locating pin, and the inner of locating pin offsets with the lateral wall of conflict round pin 9 and lean on. Of course, the interference pin 9 can also be fixedly installed in the fixing through hole 8 by means of screw connection.
In the embodiment, the rotating sleeve 3 and the driven bevel gear 4 are of an integral structure, and the fixing through hole 8 and the positioning through hole 10 are both disposed on the driven bevel gear 4.
Further, the rotating sleeve 3 is rotatably connected to the housing 1: the bearing is a shaft sleeve 11, one end of the shaft sleeve 11, which is close to the inner cavity of the casing 1, extends inwards into the inner cavity of the casing 1 and is provided with an annular end cover 12, the end face of the driven bevel gear 4, which deviates from the shaft sleeve 11, is provided with bevel teeth, the end face, which is close to the shaft sleeve 11, is in sliding contact with the corresponding end face of the annular end cover 12, and one end of the rotating sleeve 3, which deviates from the casing 1, extends outwards out of the casing 1 and is in threaded connection with a.
In addition, in the practical use process, the needle bar 2 rotates to drive the upper thread penetrating the sewing needle to rotate, so that the upper thread is wound on the needle bar 2 and the normal work of the sewing machine is influenced, therefore, the upper end surface of the needle bar 2 is provided with a thread passing hole 14 along the axial direction of the upper end surface, the thread passing hole 14 is a blind hole, the side wall of the lower end of the needle bar 2 outside the machine shell 1 is provided with a thread outlet 15, the thread outlet 15 is communicated with the thread passing hole 14, and the thread passing hole (14) and the thread outlet 15 are lead channels of the upper thread of the sewing machine. The upper thread passes through the thread passing hole 14 and the thread outlet 15 of the needle bar 2 in sequence and then passes through the sewing needle, namely the upper thread passes through the inner cavity of the needle bar 2, so that the upper thread can not be wound on the needle bar 2 when the needle bar 2 rotates.
Meanwhile, in the actual working process, in order to avoid the thread breakage of the upper thread of the sewing machine under the radial shearing action of the thread outlet 15, the thread outlet 15 is obliquely arranged, the lower end of the thread outlet 15 is positioned on the side wall of the lower end of the needle rod 2, and the upper end of the thread outlet 15 is positioned at the bottom of the thread passing hole 14.
Furthermore, optimize the position relation between the rotating sleeve 3 and the needle bar 2 and the casing 1, the rotating sleeve 3 is arranged at the bottom of the inner cavity of the casing 1, the sliding sleeve 16 is arranged at the top of the inner cavity of the casing 1 in a penetrating manner, the upper end of the needle bar 2 is arranged in the sliding sleeve 16 in a penetrating manner, and the needle bar 2 can slide up and down relative to the sliding sleeve 16.
The utility model discloses an actuating mechanism drive needle bar 2 among the prior art reciprocates, its actuating mechanism is including the main shaft 17 of being connected with the power supply transmission, the tip of main shaft 17 is provided with crank 18, crank 18 is articulated with eccentric pin 19's one end, eccentric pin 19's the other end is articulated with connecting rod 20's one end, and eccentric pin 19's one end axis is not on same straight line with the other end axis, connecting rod 20's the other end articulates there is transmission pin 21, transmission pin 21's wherein one end is provided with the drive axle sleeve 2211 of suit on needle bar 2, it is equipped with spacing collar 23 all to fix the cover on the needle bar 2 at both ends about being located drive axle sleeve 2211. The main shaft 17 and the crank 18 are driven by a power source to rotate, and are hinged and driven by an eccentric pin 19, a connecting rod 20 and a driving pin 21, so that the needle bar 2 is driven to move up and down. In the present embodiment, the above-mentioned rotating sleeve 3 and sliding sleeve 16 both guide the needle bar 2.
The above-mentioned embodiment is only one of the preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, so: all equivalent changes made according to the shape, structure and principle of the utility model are covered within the protection scope of the utility model.
Claims (8)
1. The utility model provides a sewing machine's needle bar rotary mechanism, is including setting up needle bar (2) on casing (1), and needle bar (2) reciprocate by the actuating mechanism drive, its characterized in that: the needle rod (2) is sleeved with a rotary sleeve (3), the needle rod (2) can slide up and down relative to the rotary sleeve (3), and the rotary sleeve (3) is rotatably connected to the machine shell (1) through a bearing; one end of the rotary sleeve (3) close to the inner cavity of the machine shell (1) extends inwards into the inner cavity of the machine shell (1) and is provided with a driven bevel gear (4), the outer side wall of the machine shell (1) is provided with a rotary motor (5), the output end of the rotary motor (5) penetrates through the outer side wall of the machine shell (1) to the inner cavity of the machine shell (1) and is provided with a driving bevel gear (6), the driving bevel gear (6) is meshed with the driven bevel gear (4) and is connected with the driven bevel gear (4), and the rotary sleeve (3) is connected with the needle rod (2) through a circumferential.
2. A needle bar rotating mechanism of a sewing machine according to claim 1, wherein: circumferential connection subassembly is including setting up plane (7) on needle bar (2) lateral wall along the axial, radially seted up fixing hole (8) along it on the lateral wall of rotatory sleeve (3), fixing hole (8) interpolation is equipped with conflict round pin (9), and conflict round pin (9) and plane (7) sliding contact.
3. A needle bar rotating mechanism of a sewing machine according to claim 2, wherein: and a positioning through hole (10) is radially formed in the side wall of the rotating sleeve (3) along the fixing through hole (8), a positioning pin is inserted into the positioning through hole (10), and the inner end of the positioning pin abuts against the side wall of the abutting pin (9).
4. A needle bar rotating mechanism of a sewing machine according to claim 3, wherein: the rotating sleeve (3) and the driven bevel gear (4) are of an integrated structure, and the fixing through hole (8) and the positioning through hole (10) are arranged on the driven bevel gear (4).
5. A needle bar rotating mechanism of a sewing machine according to claim 1, wherein: the bearing is a shaft sleeve (11), one end, close to the inner cavity of the shell (1), of the shaft sleeve (11) extends inwards into the inner cavity of the shell (1) and is provided with an annular end cover (12), the end face, deviating from the shaft sleeve (11), of the driven bevel gear (4) is provided with bevel teeth, the end face, close to the shaft sleeve (11), is in sliding contact with the corresponding end face of the annular end cover (12), and one end, deviating from the shell (1), of the rotating sleeve (3) extends outwards out of the shell (1) and is in threaded connection with a clamping nut (13).
6. A needle bar rotating mechanism of a sewing machine according to claim 1, wherein: the upper end face of the needle rod (2) is provided with a thread passing hole (14) along the axial direction of the needle rod, the thread passing hole (14) is a blind hole, a thread outlet (15) is formed in the side wall of the lower end of the needle rod (2) outside the shell (1), the thread outlet (15) is communicated with the thread passing hole (14), and the thread passing hole (14) and the thread outlet (15) are thread leading channels of sewing machine upper threads.
7. A needle bar rotating mechanism of a sewing machine according to claim 6, wherein: the outlet (15) is obliquely arranged, the lower end of the outlet (15) is positioned on the side wall of the lower end of the needle rod (2), and the upper end of the outlet is positioned at the bottom of the thread passing hole (14).
8. A needle bar rotating mechanism of a sewing machine according to claim 6, wherein: the rotating sleeve (3) is arranged at the bottom of the inner cavity of the machine shell (1), the top of the inner cavity of the machine shell (1) is provided with a sliding sleeve (16) in a penetrating manner, the upper end of the needle rod (2) penetrates through the sliding sleeve (16), and the needle rod (2) can slide up and down relative to the sliding sleeve (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920920183.7U CN210215808U (en) | 2019-06-18 | 2019-06-18 | Needle bar rotating mechanism of sewing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920920183.7U CN210215808U (en) | 2019-06-18 | 2019-06-18 | Needle bar rotating mechanism of sewing machine |
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| Publication Number | Publication Date |
|---|---|
| CN210215808U true CN210215808U (en) | 2020-03-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920920183.7U Active CN210215808U (en) | 2019-06-18 | 2019-06-18 | Needle bar rotating mechanism of sewing machine |
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| CN (1) | CN210215808U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112226926A (en) * | 2020-10-24 | 2021-01-15 | 深圳市雅诺科技股份有限公司 | Needle bar rotating mechanism of sewing machine |
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2019
- 2019-06-18 CN CN201920920183.7U patent/CN210215808U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112226926A (en) * | 2020-10-24 | 2021-01-15 | 深圳市雅诺科技股份有限公司 | Needle bar rotating mechanism of sewing machine |
| CN112226926B (en) * | 2020-10-24 | 2022-05-06 | 深圳市雅诺科技股份有限公司 | Needle bar rotating mechanism of sewing machine |
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